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Triiron tetraoxide/polypyrrole/polyaniline nanometer complex and preparation method thereof

A technology of ferroferric oxide and nanocomposites, which is applied in the field of wave-absorbing materials, can solve problems such as narrow absorption bandwidth, and achieve wide absorption bandwidth, enhanced wave-absorbing effect, and light weight

Inactive Publication Date: 2017-09-05
江苏求润纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve defects such as narrow absorption bandwidth in the prior art, the present invention provides a nanocomposite of ferric oxide / polypyrrole / polyaniline and its preparation method

Method used

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  • Triiron tetraoxide/polypyrrole/polyaniline nanometer complex and preparation method thereof
  • Triiron tetraoxide/polypyrrole/polyaniline nanometer complex and preparation method thereof
  • Triiron tetraoxide/polypyrrole/polyaniline nanometer complex and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The ferroferric oxide / polypyrrole / polyaniline nanocomposite comprises a triiron tetroxide core layer, a polypyrrole layer wrapping around the ferric oxide core layer and a polyaniline layer wrapping around the polypyrrole layer.

[0030] The preparation method of above-mentioned ferric oxide / polypyrrole / polyaniline nanocomposite comprises:

[0031] 1) Synthesis of Fe3O4 nanoparticles

[0032] Preparation of Fe by coprecipitation method 3 o 4 Nanoparticles: Add 40ml of deionized water into a three-necked flask, deoxygenate with nitrogen for 20min, and dissolve 0.43g of FeCl 2 4H2O and 1.18g FeCl 3 ·6H 2O was added to the three-necked flask, stirred at 700rpm and heated to 50°C, about 4.5ml of ammonia water (26wt%) was added dropwise, and the Ph value was adjusted to 11, the solution turned black rapidly after adding ammonia water, magnetic nanoparticles were generated, and the reaction was carried out at 50°C Continue to stir for 1h, then cool to room temperature, s...

Embodiment 2-6

[0062] According to the preparation method and steps of Example 1, nanocomposites containing different ratios of ferric oxide / polypyrrole / polyaniline were prepared, and their specific formulations and wave-absorbing properties are shown in Table 2.

[0063] Table 2

[0064]

[0065] The data in Table 2 are the data under the condition that the thickness is 2.0mm, and the Fe 3 o 4 and Fe 3 o 4 The effective absorption bandwidths of / PPy are all less than 6, and the absorption peaks are larger than all Fe 3 o 4 The value corresponding to the / ppy / PANI ratio is low. Compared with the maximum absorption peak, the absorption bandwidth is a more important evaluation index, because the difference in absorption efficiency between -47dB and -50dB is already negligible, so Example 1 is the best experimental group. In addition, the density of Fe3O4 is 5.17 g / cm3. After introducing low-density PPy and PANI (both 1 g / cm3), the density of different Fe3O4 / PPyrrole / PANI nanocomposite...

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Abstract

The present invention discloses a triiron tetraoxide / polypyrrole / polyaniline nanometer complex and a preparation method thereof, wherein the triiron tetraoxide / polypyrrole / polyaniline nanometer complex comprises a triiron tetraoxide core layer, a polypyrrole layer wrapped around the periphery of the triiron tetraoxide core layer, and a polyaniline layer wrapped around the periphery of the polypyrrole layer. According to the present invention, the triiron tetraoxide (Fe3O4) / polypyrrole (PPy) / polyaniline (PANI) nanometer complex has excellent microwave absorbing ability, and is superior to the existing similar complexes in the prior art; and the large-scale electric conduction network is established in the system by introducing the multilayer electric conduction polymer so as to substantially reduce the resistivity, and the interfacial polarization is introduced through the wrapping between different mediums so as to improve the impedance matching, such that the wave absorbing effect of the system is substantially enhanced.

Description

technical field [0001] The invention relates to a ferric oxide / polypyrrole / polyaniline nanocomposite and a preparation method thereof, belonging to the field of wave-absorbing materials. Background technique [0002] Microwave absorbing materials have attracted more and more attention in recent years, and they all play an important role in precision instruments, military stealth technology and electromagnetic shielding technology. Absorbing materials with excellent performance usually need to have the characteristics of wide absorption, strong attenuation, light weight and thin thickness, which requires the material to have high magnetic loss or high dielectric loss, good impedance matching, and under the premise of light weight The electromagnetic parameters conform to the loss theory. However, these characteristics are difficult to appear in one material at the same time: impedance matching is affected by both electrical properties and magnetic properties, and the mechani...

Claims

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Application Information

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IPC IPC(8): C08L79/04C08L79/02C08K3/22C08G73/06C08G73/02
CPCC08G73/0266C08G73/0611C08K2003/2275C08K2201/003C08K2201/011C08L79/02C08L79/04C08K3/22
Inventor 李炳臻张扬
Owner 江苏求润纳米科技有限公司
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